I like the new simplemembership feature in MVC 4 internet template with links to OAuth for external logins in VS 2012 RTM. For the most part authentication feature are worki
Had the same problem when I was moving my web app from VS2010/MVC3 to VS2012/MVC4.
And couldn´t get [InitializeSimpleMembership] to work.
Found out that adding this to your web.config does the trick:
And everything works fine as it did before.